You have been dispatched for an unknown medical at the local grocery store. Your patient was shopping with her husband when he says that she began complaining of "the worst headache of her life" and became extremely nauseous, vomiting several times. The patient is currently unconscious with an irregular respiratory pattern. What do you think is wrong with your patient?

A. Diabetic Ketoacidosis
B. Seizures
C. Ischemic stroke
D. Subarachnoid hemorrhage